Re: [Cal_Boats] Re: Compression Post Rebuild

On the Cal 28 (flat top) a part of the downward load of the mast is borne by the fiberglass deck, bonded to the plywood overhead. This is stabilized by a light beam screwed and glassed to the forward face of the main bulkhead where it meets the overhead. So the tension of the main stays opposes the compression of the mast, limited by the shear strength of the plywood bulkheads, as glassed and tabbed to the hull, with the weight of the rig supported and transferred to the hull through deck, bulkhead, inner liner, and, of course, the wooden compression post. The wooden compression post also provides a conduit for wiring to supply 12 v power to the spreader lights and masthead light. Geo. Barlow Cal 28 No. 155

I wanted to reply on the CAL 28 mast support design, but I am missing a proper term. On the CAL 25 there is a raised area on the deck where the mast base sits. It provides load distribution to the mast support "beams" on either side of the companionway at the main bulkhead below. Is the proper term for that raised area on the deck "pedestal"? Thanks Charlie From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of George Barlow Sent: Monday, October 15, 2012 1:49 PM To: Ca… [at] yahoogroups.com Subject: [External] Re: [Cal_Boats] Re: Compression Post Rebuild On the Cal 28 (flat top) a part of the downward load of the mast is borne by the fiberglass deck, bonded to the plywood overhead. This is stabilized by a light beam screwed and glassed to the forward face of the main bulkhead where it meets the overhead. So the tension of the main stays opposes the compression of the mast, limited by the shear strength of the plywood bulkheads, as glassed and tabbed to the hull, with the weight of the rig supported and transferred to the hull through deck, bulkhead, inner liner, and, of course, the wooden compression post. The wooden compression post also provides a conduit for wiring to supply 12 v power to the spreader lights and masthead light. Geo. Barlow Cal 28 No. 155 ------------------------------------ Yahoo! Groups Links

Looking at some of the pics on line that seems to be one heck of mast on this vessel. Was wondering what extrusion was used, looks pretty similar to the 29 which I understand was the same as the 34. Anyone have a clearer perspective on this mast? Best regards /ch